Who is

At O'Brien, we engineer the energy systems that power industry.

For more than 20 years, we have helped commercial businesses improve performance, reduce energy consumption, lower emissions and increase operational reliability through expertly engineered energy solutions.

As Australia's largest privately owned supplier of industrial boiler and hot water systems, our expertise extends far beyond equipment supply. We design, manufacture, install, train and maintain complete energy systems that enable businesses to operate more efficiently today while preparing for the energy demands of tomorrow.

Our team of engineers, technicians and energy specialists work across every stage of the energy lifecycle—from feasibility and design through to installation, commissioning, training, servicing and ongoing optimisation. Whether delivering high-efficiency boiler systems, electrified heat solutions, waste heat recovery, renewable energy technologies or bespoke energy infrastructure, our focus remains the same: engineering better energy outcomes for our clients.

We believe great engineering creates lasting impact. It reduces operating costs. It improves reliability. It minimises downtime. It lowers emissions. And it helps Australian industry remain competitive in an increasingly energy-conscious world.

As we continue to expand our manufacturing capabilities and global partnerships, our commitment remains unchanged: combining engineering excellence with practical innovation to deliver energy solutions that perform.

We are Energy Engineered

We are